What is the difference between crushed stone and Natural Pea Gravel?

Crushed stone has angular, broken faces, so the pieces interlock and a fines-bearing grade like Class A roadstone compacts into a firm base. Natural Pea Gravel is rounded, washed river gravel at about 3/8 inch, sold here as 3/8" Natural Pea Gravel. It drains well and feels good underfoot, but rounded stone does not lock together, so it suits walkways, play areas and patio bedding rather than a drive base.

Should I order material by the ton or by the yard?

Both work, and the choice mostly comes down to how you want to compare the load. Tons tell you the weight of stone on the truck, and yards tell you the volume it will fill on the ground. Each product page has a calculator to help you size a load either way, and you choose the quantity when you order online.

Which stone is best for drainage in Allamakee County?

Washed, open graded stone is what moves water, so Clean Rock is the pick for subdrains, pipe bedding, drainage tile backfill and septic rock. 3/8" Crushed Stone handles fine drainage and paver joints. With karst ground and thin soil over rock, water that cannot soak in has to be carried away instead.

Allamakee County Landscape Rock and Gravel, IA

Iowa Rock Supply delivers gravel, stone and aggregate delivery in Allamakee County, IA, by the ton or by the yard, ordered online. Thin soil sits over limestone, dolomite, sandstone and shale across the Paleozoic Plateau, the driftless northeast, and bedrock is shallow on the ridgetops.

That ground decides your base. Class A roadstone, the 3/4 inch crushed limestone with the fines left in, is the base course Iowa driveways and lanes are built on, and a soft, shallow spot calls for more of it before anything finer goes down.

Ground conditions across Allamakee County

The working season runs between the spring thaw and the fall freeze. Steep drives and switchback lanes are the constraint here, and winter access on grades is why surfaces get topped up in the fall.

Karst shapes how water moves across the Paleozoic Plateau, the driftless northeast. Water disappears into sinkholes, fractures and underground passages rather than running off, and springs run year round.

Thin soil over rock leaves nowhere for water to sit. Steep valley sides send runoff down fast after a storm, and that runoff scours drives and lanes, with bank cutting on the rivers in this part of the state.

Frost works into fractured rock and thin soil through cold winters in deep, shaded valleys. It breaks up surfaces on steep lanes and drives each spring, so a fines-bearing base that binds and compacts matters more than a loose cover.

Materials delivered in Allamakee County

Material is organized here by size, from the coarsest stone down to the finest. Each one has a job it does well and a job it does badly.

Class A roadstone carries the most weight in this county.

11 and Class C gravel to Gradation No. 10.

County engineers and city entrance standards call the same material roadstone and write it as Class A roadstone.

Above it, 3/4" Crushed Stone gives you a loose, free draining drive surface, plus pipe bedding and trench backfill. Below it, Washed Sand beds and levels under slabs and pavers.

Choosing the right material

Winneshiek County and Clayton County share this ground. Both sit on the Paleozoic Plateau, the driftless northeast, with the same thin soil over limestone, dolomite, sandstone and shale and the same near absence of glacial deposits, so the base and drainage choices carry over unchanged.

Fayette County spans more than one zone. Part of it sits on the Iowan Surface, where glacial deposits cover the ground, and part on the Paleozoic Plateau.

On the Iowan Surface side, deeper, less rocky soil changes what a drive sits on.

Where glacial material covers the ground, a base can be built up in soil rather than tied to shallow rock. Where bedrock is close to the surface, as it is on the ridgetops here, the base follows the rock and drainage has to move water off the surface instead of into it.

A few choices come down to how the material behaves. Crushed limestone with fines binds and compacts into a base.

Washed, open graded stone will not bind, and that is the point when you want water to pass through. Rounded river rock is decorative and does not lock together.

Delivery across Allamakee County

You order online and a dump truck tips the load on site as one pile. Coverage runs across the county, including Waukon, Postville, Lansing, New Albin, Harpers Ferry, Waterville and Dorchester.

Quantities are ordered by the ton or by the yard. Each product page has a calculator, and you pick your delivery date at checkout.

Steep drives and narrow lanes are worth thinking about before the truck arrives. There is no spreading or placing on delivery, so plan where the pile should sit and work from there.

Order bulk gravel and stone in Allamakee County

Iowa Rock Supply delivers Class A roadstone, clean rock, sand, soil and decorative stone across Allamakee County, including Waukon, Postville, Lansing, New Albin, Harpers Ferry, Waterville and Dorchester. Choose your material, size the load by the ton or the yard, and pick a delivery date at checkout.

Place your order online when you are ready.

Bulk Gravel and Stone Delivery in Allamakee County, IA